What is Pancreatic Islet? What is the relationship between pancreatic islets and pancreas?

Pancreatic islets (langerhans) are the endocrine part of the pancreas, which are many clumps of cells of different sizes and shapes, scattered throughout the pancreas, and the hormones produced by the islets are insulin, which can control the metabolism of carbohydrates; If insulin secretion is insufficient, diabetes mellitus. Pancreatic islets secrete hormones such as insulin and glucagon. According to their staining and morphological characteristics, human pancreatic islet cells are mainly divided into A cells, B normal islet cells, D cells and PP cells.

A cells account for about 20% of pancreatic islet cells and secrete glucagon; B cells make up 60%-70% of islet cells and secrete insulin; D cells account for 10% of pancreatic islet cells and secrete "somatostatin"; PP cells are few in number and secrete pancreatic polyeptide.

The endocrine part of the pancreas is an irregular group of cells scattered throughout the pancreas. Pancreatic islets have at least three types of cells: A (or A2) cells secrete glucagon; B (or) cells secrete insulin; More recently, a type of cell, called a D (or δ or 1) cell, has been discovered, which normally secretes growth hormone that inhibits the release of hormones.

When D-cells proliferate or tumors occur, large amounts of gastrin are secreted, which is called gastrinoma. Peptic ulcer can cause excessive gastric acid secretion. These cells of pancreatic islets are close to the capillaries, and the hormones secreted by them penetrate into the blood through the capillary walls, which have the effect of regulating glucose metabolism.

Pancreas means "pancreas". A digestive gland in humans and vertebrates that also has endocrine functions.

1. The pancreas is a long and narrow gland, which is placed horizontally on the plane of the 1 to 2 lumbar vertebrae of the posterior abdominal wall, with a soft texture and gray-red color, which is an organ deep in the abdomen of the human body. The pancreas is divided into two parts: exocrine glands and endocrine glands.

2. Exocrine is composed of acinar and ducts that connect the intestinal lumen, and endocrine is composed of pancreatic islets, which mainly secrete hormones such as insulin and glucagon, some of which play a very important role in maintaining the level of blood glucose.

3. The pancreas "resides" in the retroperitoneum, so that its popularity is far less than that of the stomach, duodenum, liver, and gallbladder, but the digestive enzymes in the pancreatic juice secreted by the pancreas play a "protagonist" role in the process of food elimination and acreization, especially the digestion of fat.

Dangers of pancreatitis:

1. However, if a large amount of protein is consumed during a meal, it may cause severe acute pancreatitis. If you eat a lot of protein foods and drink too much alcohol, you have a greater chance of causing acute pancreatitis.

2. The possibility of diabetes depends on the degree of inflammation of pancreatitis, if it is edematous pancreatitis, it will recover quickly, and if it is acute necrotizing pancreatitis, it will affect the function of pancreas to secrete insulin, so that insulin secretion is too little or even secreted.

3. This leads to diabetes, which is called secondary diabetes caused by other diseases. Therefore, if you want to avoid diabetes, it is also very important to protect the source of pancreas.

The islets secrete insulin, the pancreas secretes digestive juices, the pancreas is an exocrine gland, and the islets are endocrine glands.

The pancreas is divided into exocrine and endocrine, the exocrine part is the pancreas, and the endocrine part is scattered in the exocrine department, like an islet, called pancreatic islets.

The pancreas and the islets are conceptually different, one is an organ and the other is a tissue.

Pancreatic islets are the endocrine part of the pancreas, which are many cell clusters of different sizes and shapes, scattered throughout the pancreas, and the hormones produced by the pancreas are insulin, which can control the metabolism of carbohydrates; If insulin secretion is insufficient, diabetes mellitus.

The pancreas is a gland with both endocrine and exocrine functions, its physiological role and pathological changes are closely related to life, and several digestive enzymes in the secreted pancreatic juice play a "protagonist" role in the process of food digestion, especially the digestion of fat.

The pancreas is located in the upper ventral region and the left hypochondrium. The stomach and peritoneum are about the same as the first lumbar vertebrae, lying transversely on the posterior abdominal wall, and are a long strip-like gland. It is about 14-18 centimeters long and weighs 65-75 grams.

The lower border of the pancreas is projected on the surface of the anterior abdominal wall equivalent to 5 cm above the umbilicus, and the upper edge is equivalent to 10 cm above the umbilicus. The pancreas is divided into four parts: head, neck, body, and tail, and there is no clear boundary between these parts. Its right end is the head of the pancreas, surrounded by the duodenum, and adjacent to the common bile duct, portal vein, and inferior vena cava.

The pancreatic neck is the transitional part between the head and body, with the upper duodenum and pylorus in front and above, and the superior mesenteric vein and splenic vein behind it to form the portal vein. The body of the pancreas is long, the middle part of the pancreas, and its anterior septum is adjacent to the posterior wall of the stomach with the small omentum sac, and the left kidney and left adrenal gland are connected to the back. The tail of the pancreas is the part of the pancreatic body that gradually migrates to the left and becomes tapered, adjacent to the splenic hilum (Figure 14).

The pancreas is located in the upper ventral region and the left hypochondrium. The stomach and peritoneum are about the same as the first lumbar vertebrae, lying transversely on the posterior abdominal wall, and are a long strip-like gland. It is about 14-18 centimeters long and weighs 65-75 grams.

The lower border of the pancreas is projected on the surface of the anterior abdominal wall equivalent to 5 cm above the umbilicus, and the upper edge is equivalent to 10 cm above the umbilicus. The pancreas is divided into four parts: head, neck, body, and tail, and there is no clear boundary between these parts. Its right end is the head of the pancreas, surrounded by the duodenum, and adjacent to the common bile duct, portal vein, and inferior vena cava.

The pancreatic neck is the transitional part between the head and body, with the upper duodenum and pylorus in front and above, and the superior mesenteric vein and splenic vein behind it to form the portal vein. The body of the pancreas is long, the middle part of the pancreas, and its anterior septum is adjacent to the posterior wall of the stomach with the small omentum sac, and the left kidney and left adrenal gland are connected to the back. The tail of the pancreas is the part of the pancreatic body that gradually moves to the left and becomes tapered, adjacent to the splenic hilum.

What is the pancreas: There is a very inconspicuous little organ deep in the upper abdomen of our body, and it is the pancreas. The pancreas is small, but it has an extraordinary role, and it can be said that it is one of the most important organs in the human body.

The reason why the pancreas is one of the most important organs of the human body is because it is a gland with both endocrine and exocrine functions, and its physiological functions and pathological changes are closely related to life.

An important digestive organ that secretes digestive juices (enzymes) and digests protein-based foods.

The pancreas refers to a very inconspicuous small organ deep in the upper abdomen of our body, which is the pancreas.

Pancreatic islets (langerhans) are the endocrine part of the pancreas, which are many clumps of cells of different sizes and shapes, scattered throughout the pancreas, and the hormones produced by the islets are insulin, which can control the metabolism of carbohydrates; If insulin secretion is insufficient, diabetes mellitus.

Pancreatic islets are not organs, islets are scattered clumps of cells between the acinar of the pancreas.

According to their staining and morphological characteristics, pancreatic islet cells in humans are mainly divided into A cells, B cells, D cells and PP cells. A cells account for about 20% of pancreatic islet cells and secrete glucagon; B cells make up 60%-70% of islet cells and secrete insulin; D cells account for 10% of pancreatic islet cells and secrete statin; PP cells are few in number and secrete pancreatic polyeptide.

To sum up, pancreatic islets cannot be considered an organ!!